I find it funny that Bioware realized Kaiden had no personality, so in ME3 they kind gave him all these weird exaggerated qualities that seem to vary wildly from scene to scene.
In one he's a skeptic, in another he's trying to be "hardcore," then he's hitting on Shepard, in another HE CAN'T STOP GRINNING
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You have no time to ponder such questions, as Link has just grabbed a Smash Ball.
http://backloggery.com/herodeltiempo/sig.gif